摘要:
Overlapping sheet articles on a first suction conveyor are intermittently diverted in groups by a lowerable second suction conveyor having a direction-changing roller which can be intermittently applied to the first conveyor and moved along therewith at the same speed and then returned.
摘要:
The invention concerns a method and an apparatus for manufacturing a bag or sack bottom from tubular sections of paper or plastic web. Tubular sections of web material are fed into a feeding plane where they are subsequently sealed along selected seams by a sealing means. The sections are then inverted and fed in parallel to a scoring, gluing and folding section. The tubular section is then inverted again and passed to a pressing section. The tubular sections are stacked on top of each other in a partially overlapping manner as they are passed through the pressing section. After pressing, the tubular sections are passed to a separating station for again separating them before being passed to a packaging station. The invention concerns, moreover, an apparatus for operating the above mentioned method.
摘要:
An apparatus for the transfer of flat workpieces from a first conveyor to a second conveyor consists of a first conveyor with two endless pulling members circulating parallel to each other over guide wheels or drive wheels which carry in pairs supporting elements with pins. The pins perforating and conveying the workpieces project above a table forming the conveyance path by virtue of the supporting elements and the pins having attachments which run in guides that are parallel to the table and which displace the attachments towards each other. The pulling members of the second conveyor carry in pairs supporting elements with pins which project above a table forming the conveyance path. In the transfer zone of the two conveyors, a plunger is arranged in the frame and mounted in guides. The plunger can be raised and lowered and impales the workpieces onto the pins of the second conveyor. By means of this transfer apparatus, it is possible to convey flat workpieces, in particular those made of a plastic film, through various processing stations. With such an arrangement transition from an intermittent conveying to a continuous conveying is also possible.
摘要:
An apparatus for dividing a continuously conveyed stream of shingled workpieces, such as bags or sacks, into leading and trailing parts has two consecutive endless belt conveyors. The downstream second belt conveyor is driven, during a dividing operation, at a higher velocity than the first upstream conveyor in order to pull the shingled stream apart. After the stream has been divided into the leading and trailing parts the second conveyor is driven at the same velocity as the first conveyor. To provide separation of the stream into parts consisting of an exactly predetermined number of workpieces, an intermediate endless belt conveyor is provided, which extends parallel to the trailing portion of the second belt conveyor and during the dividing operation revolves at a lower velocity than the second belt conveyor. The intermediate conveyor is provided with cams for arresting the leading workpiece of the trailing part of the shingled stream, against an upper pressure belt.
摘要:
In a bag-making machine comprising a tube-making device and a device parallel thereto for forming bases on flattened individual tube sections fed longitudinally from the tube-making device, an apparatus for deflecting the tube sections comprises spaced parallel double belt conveyors respectively leading to and from a transverse double belt conveyor. A first turning device transfers the tube sections from one of the parallel conveyors to the transverse conveyor so that they continue to be fed longitudinally and a second turning device ensures that the tube sections are fed transversely to the base-forming device.
摘要:
Apparatus for successively depositing sections severed from the leading end of a web of film on a support to form a stack in which the sections are staggered comprises an output shaft carrying two suction tubes or suction tube rows which engage a respective section and transfer it to the support as the output shaft is turned intermittently by interconnected crank arms from an input shaft which is horizontally offset from the output shaft and parallel thereto. The tubes or rows of tubes include an obtuse angle and are alternately revolved by the output shaft through the obtuse angle and the explement thereof.
摘要:
An apparatus for storing flat articles comprises a first conveyor, two deflectors for diverting the articles fro the first conveyor to a second slower conveyor disposed beneath each deflector at right-angles to the first conveyor for receiving the articles in an overlapping formation, a frame adjoining the second conveyor and carrying rollers at each end, endless driven conveyor belts passing over the rollers, the frame being pivotable about the axis of one of the rollers so that the other roller is disposed adjacent to a winding for receiving covolutions of the overlapping formation of articles and so that the belts are in contact with the convolutions to turn the core, and a supply reel of holding tape associated with each winding core.
摘要:
A device for separating sections of a perforated tubular web includes a pulling mechanism and a tearing mechanism. Each of these mechanisms has opposing rollers positioned facing each other on either side of the tubular section being separated. Continuous conveyor belts run over these rollers. The rollers of the tearing mechanism can be moved by a control element toward the tubular web. To prevent slippage of the web within the pulling mechanism when the tubular sections are being torn, the pulling mechanism is also provided with a control element which moves the rollers or cylinders of the pulling mechanism in a direction perpendicular to the tubular web in order to increase the pressure on the tubular web. The control element of the pulling mechanism is synchronized with a control element of the tearing mechanism.
摘要:
A flattening and removing device for a plastic tubular film web produced by a stationary film blowing head in a blowing process has two deflecting rollers and two turning bars. The first deflecting roller and the squeezing roller are mounted parallel to each other between mounting plates that are rigidly connected to a turntable mounted in turning fashion in the frame floor. The second deflecting roller is connected by a support frame to a retainer having ends which are connected to gearwheels in eccentric fashion. The turning bars are each connected by support frames to gearwheels, and the center lines of all the gearwheels are aligned with each other and with an imaginary swivel axis. Thus, the diameter of the turning bars can be increased to the desired degree without impeding the passage of the flattened tubular film when the device is installed.
摘要:
A method for making bags of synthetic material in which a tubular foil web of synthetic material is advanced in steps corresponding to the length of one bag. A continuously heated pair (11) of welding jaws grips the tubular foil web (3) of synthetic material prior to cutting and fixes the web in position. The tubular foil web (3) is then cut by means of the transverse cutting knife (10) before the heat of the pair (11) of welding jaws is completely transferred to the tubular foil web (3) of synthetic material. Then the heat is completely transferred to weld the bottom seam of the bag.